替我写一个JAVA图片模糊的工具类，要求传入参数为File，返回值为File，通过该工具类处理能将图片模糊

非常感谢您的提问！以下是一个简单的JAVA图片模糊的工具类，可以满足您的需求：

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class ImageBlurTool {
    public static File blurImage(File inputImageFile) throws IOException {
        BufferedImage inputImage = ImageIO.read(inputImageFile);

        int width = inputImage.getWidth();
        int height = inputImage.getHeight();

        BufferedImage outputImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        int blurRadius = 10; // 模糊半径
        float weight = 1.0f / (blurRadius * blurRadius);

        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                float r = 0, g = 0, b = 0;

                for (int dx = -blurRadius; dx <= blurRadius; dx++) {
                    for (int dy = -blurRadius; dy <= blurRadius; dy++) {
                        int nx = x + dx;
                        int ny = y + dy;

                        if (nx >= 0 && nx < width && ny >= 0 && ny < height) {
                            int pixel = inputImage.getRGB(nx, ny);

                            float pixelWeight = weight;

                            if (dx == 0 && dy == 0) {
                                pixelWeight *= 4;
                            } else if (dx == 0 || dy == 0) {
                                pixelWeight *= 2;
                            }

                            r += pixelWeight * ((pixel >> 16) & 0xff);
                            g += pixelWeight * ((pixel >> 8) & 0xff);
                            b += pixelWeight * (pixel & 0xff);
                        }
                    }
                }

                int ir = Math.round(r);
                int ig = Math.round(g);
                int ib = Math.round(b);

                int pixel = (ir << 16) | (ig << 8) | ib;

                outputImage.setRGB(x, y, pixel);
            }
        }

        File outputImageFile = new File("output.jpg");
        ImageIO.write(outputImage, "jpg", outputImageFile);

        return outputImageFile;
    }
}

您可以将该代码保存为 ImageBlurTool.java 文件，并在您的项目中使用该工具类来处理图片模糊。例如：

File inputImageFile = new File("input.jpg");
File outputImageFile = ImageBlurTool.blurImage(inputImageFile);

该工具类使用了简单的高斯模糊算法来实现图片模糊。如果您需要更高质量的模糊效果，可以考虑使用其他更复杂的算法。